GB1429411A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
GB1429411A
GB1429411A GB99774A GB99774A GB1429411A GB 1429411 A GB1429411 A GB 1429411A GB 99774 A GB99774 A GB 99774A GB 99774 A GB99774 A GB 99774A GB 1429411 A GB1429411 A GB 1429411A
Authority
GB
United Kingdom
Prior art keywords
counter
oscillator
count
input data
decoder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB99774A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1429411A publication Critical patent/GB1429411A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/20—Dynamic coding, i.e. by key scanning
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/0227—Cooperation and interconnection of the input arrangement with other functional units of a computer

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Digital Computer Display Output (AREA)
GB99774A 1973-02-05 1974-01-09 Data transmission system Expired GB1429411A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00329955A US3825926A (en) 1973-02-05 1973-02-05 Interfacing circuitry for connecting a remote keyboard with a data receiving buffer

Publications (1)

Publication Number Publication Date
GB1429411A true GB1429411A (en) 1976-03-24

Family

ID=23287726

Family Applications (1)

Application Number Title Priority Date Filing Date
GB99774A Expired GB1429411A (en) 1973-02-05 1974-01-09 Data transmission system

Country Status (5)

Country Link
US (1) US3825926A (enrdf_load_stackoverflow)
JP (1) JPS5621170B2 (enrdf_load_stackoverflow)
DE (1) DE2401021A1 (enrdf_load_stackoverflow)
FR (1) FR2253241B1 (enrdf_load_stackoverflow)
GB (1) GB1429411A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4499807A (en) * 1980-09-05 1985-02-19 Casio Computer Co., Ltd. Key data entry system for an electronic musical instrument

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920926A (en) * 1973-12-07 1975-11-18 Northern Electric Co Telephone data set including visual display means
US3973256A (en) * 1975-07-14 1976-08-03 Compucorp Key detection system interconnecting keyboard and data processing system
US4064560A (en) * 1975-07-25 1977-12-20 Bunker Ramo Corporation Master keyboard terminal with auxiliary keyboard terminal capability
US4106011A (en) * 1975-10-24 1978-08-08 Tektronix, Inc. Keyboard circuit
GB1575002A (en) * 1976-03-11 1980-09-17 Post Office Data transmission system
JPS5367728U (enrdf_load_stackoverflow) * 1976-11-09 1978-06-07
US4194188A (en) * 1977-09-26 1980-03-18 Redactron Corporation Interrogation of key switches using pulse width detection
JPS54121026A (en) * 1978-03-13 1979-09-19 Fujitsu Ltd Input control system
GB2094529B (en) * 1981-03-06 1984-07-18 Solartron Electronic Group The Keyboard modules for use in data terminals

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675239A (en) * 1970-09-14 1972-07-04 Ncr Co Unlimited roll keyboard circuit
NL166140C (nl) * 1970-11-14 1981-06-15 Philips Nv Toetsenbord.
US3760409A (en) * 1971-11-17 1973-09-18 Alan M Voorhees Programmable keyboard and keys

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4499807A (en) * 1980-09-05 1985-02-19 Casio Computer Co., Ltd. Key data entry system for an electronic musical instrument

Also Published As

Publication number Publication date
FR2253241A1 (enrdf_load_stackoverflow) 1975-06-27
JPS49107627A (enrdf_load_stackoverflow) 1974-10-12
FR2253241B1 (enrdf_load_stackoverflow) 1978-06-16
JPS5621170B2 (enrdf_load_stackoverflow) 1981-05-18
DE2401021A1 (de) 1974-08-08
US3825926A (en) 1974-07-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee